@charset 'utf-8';
$font-size:40px;
@function w($px) {
    @return ($px/$font-size)*1rem;
}
html {
    font-size: $font-size;
}
.musicbutton{
    width: w(50px);
    height: w(50px);
    position: absolute;
    top: w(30px);
    right: w(30px);
    background: #E7C598;
    line-height: w(50px);
    border-radius: 50%;
    .iconfont{
        display: block;
        font-size: w(35px);
        color: #BF0C21;
        animation: music 4s infinite linear;
    }
    @keyframes music{
        from{
            transform: rotate(0);
        }
        to{
            transform: rotate(360deg);
        }
    }
     @-webkit-keyframes music{
        from{
            transform: rotate(0);
        }
        to{
            transform: rotate(360deg);
        }
    }
}